SZM-20 magnetic tachometer is composed of two parts – an indicator and a sensor, which are connected together through a transmission cable without any external power supplied, able to remotely measure the rotational speed of a variety of power equipment.
◆ Working Principle
The sensor is mainly composed of a permanent magnet and an induction coil. The permanent magnet is coupled with a power equipment item through a flexible shaft. When the permanent magnet is rotated by the power equipment, the induced current is generated in the coil, which then is transmitted to the indicator via the transmission cable. Such fluctuating current, after rectified with its voltage reduced, is used to drive the wide angle ammeter for indicating the measured rotational speed.
◆ Technical Conditions
1. Precision Grade: 1.5 (at 20±2°C)
2. Working Environment: Temperature range from -25°C to +55°C.
Relative Humidity 5% -100%, inclusive of frosting
3. Humidity Added Error: An additional error is less than 1.2% of the upper limit of the measured value with every 10°C of temperature change.
4. Measurement Range: (0-1500) r/min speed ratio1:1;
(0-2000) r/min speed ratio1:1;
(0-3000) r/min speed ratio1:2;
5. Mechanical Force Tolerance: the meter can withstand the acceleration speed at 100m/S2 and 1000 continuous impacts of vibration in transport at the frequency 60100 times per minute.
◆ Operating Instructions:
1.Time for use: Able to be operated continuously without lubricant oil added.
2.The sensor shall be used together with the indicator completing with it.
3.The resistance of the transmission cable shall not be greater than1.2 ohms, which are equivalent to the wire in the specification of RVV2*l6*0.15 used for a transmission distance of 10m. An additional 0.2% error will result for each 10m of distance if the said wire is used.
◆ Installation Dimensions:
Profile dimensions: Ф108x85
Hole cutting size: Ф98
Please specify the model when ordering: SZM-20A, SZM-20B, SZM-20C, SZM-20D
Accompanying transmission cable: 1
Certificate of Conformity: 1
Both products for overseas and domestic sales have the same high quality and are same carefully packaged. Perfection is our best interpretation to professionalism.
1.3 Product Packaging
Anti-moisture, anti-extrusion, anti-shock and anti-exposure.
Specially thickened quality packaging cartons, anti-moisture and anti-shock.
Professional bubble bags inside to prevent vibration during transportation.
Our meters are carefully packed layer by layer to ensure they can withstand long-distance transit to arrive at customers
1.4 Professional Storage
Neat warehouse and clean production line